Feathers are not working properly in Flutter (rive v0.13.20)

When we add feathers in the Rive editor, it works well. However, when we export it as a .riv file and try to use it in our Flutter app, we experience all sorts of visual issues, such as layers disappearing. We also get errors in the console.

══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞══════════════════════

The following RangeError was thrown during paint():

RangeError (length): Invalid value: Not in inclusive range 0..1:

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